Light: Bright light; morning sun with afternoon shade is a safer starting point in Phoenix. Acclimate gradually to stronger sun; full-sun tolerance varies by species.
Water: Low water; water thoroughly when the root zone has dried, then allow it to dry again. Reduce watering greatly during cool weather or dormancy; never leave containers standing in water.
Soil: Very well-drained cactus soil with ample pumice, grit, or other mineral material. Use containers with drainage holes or raised, well-drained planting areas.
Mature size: Species-dependent; some remain only a few inches tall, while others grow several feet or more. Identify individual plants before choosing permanent spacing.
Bloom: Varies by species; many bloom in spring or summer after reaching maturity. Young plants may take several years to flower.
Evergreen / deciduous: Generally evergreen, with persistent succulent stems; most have no conspicuous true leaves.
Growth rate: Usually slow, though some species grow moderately fast in favorable conditions.